19145240 has 16 divisors (see below), whose sum is σ = 43076880. Its totient is φ = 7658080.

The previous prime is 19145209. The next prime is 19145261. The reversal of 19145240 is 4254191.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239276 + ... + 239355.

It is an arithmetic number, because the mean of its divisors is an integer number (2692305).

Almost surely, 2^19145240 is an apocalyptic number.

19145240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19145240 is an abundant number, since it is smaller than the sum of its proper divisors (23931640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19145240 is a wasteful number, since it uses less digits than its factorization.

19145240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478642 (or 478638 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 19145240 is about 4375.5273967832. The cubic root of 19145240 is about 267.5183671553.

The spelling of 19145240 in words is "nineteen million, one hundred forty-five thousand, two hundred forty".